The two main varieties of coffee viz., Arabica and Robusta are grown in India. Arabica is grown in higher altitudes than Robusta. The cool and equable temperature, ranging between 15 degree C to 25 degree C, is suitable for Arabica while for Robusta, hot and humid climate with temperature ranging from 20 degree C to 30 degree C is suitable. Soil should be deep, friable, open textured rich in plant nutrients with plenty of humus and of slightly acidic nature (pH – 4.5 to 6.5).
Older leaves become yellow in color; reduced leaf size.
Pink or purple pigmentation appear in old leaves.
Occurrence of marginal chlorosis in older leaves
Characterized narrow land of marginal chlorosis of leaves turning into necrotic fallow.
Leaves become small, growth shunted.
Yellowing of young leaves; size of the leaf become small.
Young and newly developing leaves become deformed called as little leaf.
The apical shoot exhibits blackening and death.
Reduced growth and dark green colour of leaves, twin led malformed leaves.
New leaves shriveled, bushy growth.
Thin leaves with interveinal chlorosis in young leaves.
Green tinge at the base of mid rib. Leaf size reduced.
Fine network of green veins as a light green background on young leaves. Leaf remains fairly green.
Yellowing seen in young leaves; leaf size become small.
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